Basic forms of supramolecular self-assembly ­organized by parallel and antiparallel hydrogen bonds in the racemic crystal structures of six disubstituted and trisubstituted cyclopentane ­derivatives

Kálmán, A.; Argay, G.; Fábián, L.; Bernáth, G.; Fülöp, F.

doi:10.1107/S0108768101006723

Acta Crystallographica Section B
Acta Crystallographica
Section B STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS

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Figure 10
Pattern hop1: parallel helices define structure (II). A full turn of either helix involves three O1—H⋯O2 hydrogen-bonded molecules. They complete an R₄³(12) ring when an adjacent molecule from the parallel enantiomeric helix donates two NH⋯O hydrogen bonds. Between the parallel helices, there is a glide plane c which organizes these two NH⋯O hydrogen bonds into infinite chains running in opposite directions.

STRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS

ISSN: 2052-5206

Volume 57| Part 4| July 2001| Pages 539-550

doi:10.1107/S0108768101006723

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